NZ507297A - Non-destructive testing of wooden members for their strength characteristics using sound or shock waves - Google Patents

Non-destructive testing of wooden members for their strength characteristics using sound or shock waves

Info

Publication number
NZ507297A
NZ507297A NZ50729700A NZ50729700A NZ507297A NZ 507297 A NZ507297 A NZ 507297A NZ 50729700 A NZ50729700 A NZ 50729700A NZ 50729700 A NZ50729700 A NZ 50729700A NZ 507297 A NZ507297 A NZ 507297A
Authority
NZ
New Zealand
Prior art keywords
tree
sound
spike
non
strength characteristics
Prior art date
Application number
NZ50729700A
Inventor
Ralph Lindsay Boardman
Steven Lewis Graham
Addis Tsehaye
Original Assignee
Ralph Lindsay Boardman
Steven Lewis Graham
Addis Tsehaye
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ralph Lindsay Boardman, Steven Lewis Graham, Addis Tsehaye filed Critical Ralph Lindsay Boardman
Priority to NZ50729700A priority Critical patent/NZ507297A/en
Publication of NZ507297A publication Critical patent/NZ507297A/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04Analysing solids
    • G01N29/045Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22Details, e.g. general constructional or apparatus details
    • G01N29/223Supports, positioning or alignment in fixed situation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/46Wood
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/01Indexing codes associated with the measuring variable
    • G01N2291/011Velocity or travel time
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/02Indexing codes associated with the analysed material
    • G01N2291/023Solids
    • G01N2291/0238Wood
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/10Number of transducers
    • G01N2291/102Number of transducers one emitter, one receiver
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0098Plants or trees

Abstract

A non-destructive method of selecting trees (without needing to fell the tree) for their strength characteristics by measuring along the grain of the tree the modulus of elasticity; overcoming the impreciseness of visual inspection and also avoiding under-grading or over-grading timber. Said method comprising: (i) inserting a spike through any surface material and into the side of a fibrous material of the tree, (ii) creating a sound or shock wave at right angles to the side of the tree, with an input means, at an input point which is apart from the spike, said wave penetrating any surface material and the tree itself and traveling along the tree, (iii) determining the time taken for the sound or shock wave to travel along the tree from its input point to the spike, (iv) comparing said time taken to collected reference information and thus obtaining an estimation of the strength quality of the tree.
NZ50729700A 2000-10-03 2000-10-03 Non-destructive testing of wooden members for their strength characteristics using sound or shock waves NZ507297A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NZ50729700A NZ507297A (en) 2000-10-03 2000-10-03 Non-destructive testing of wooden members for their strength characteristics using sound or shock waves

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ50729700A NZ507297A (en) 2000-10-03 2000-10-03 Non-destructive testing of wooden members for their strength characteristics using sound or shock waves
AU1284202A AU1284202A (en) 2000-10-03 2001-10-01 Non-destructive testing of fibrous members
PCT/NZ2001/000205 WO2002029398A1 (en) 2000-10-03 2001-10-01 Non-destructive testing of fibrous members

Publications (1)

Publication Number Publication Date
NZ507297A true NZ507297A (en) 2003-01-31

Family

ID=19928149

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ50729700A NZ507297A (en) 2000-10-03 2000-10-03 Non-destructive testing of wooden members for their strength characteristics using sound or shock waves

Country Status (3)

Country Link
AU (1) AU1284202A (en)
NZ (1) NZ507297A (en)
WO (1) WO2002029398A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001009603A1 (en) * 1999-07-30 2001-02-08 Carter Holt Harvey Limited Log testing apparatus
EP1706736A4 (en) * 2004-01-22 2009-03-18 Univ Minnesota Method and apparatus for evaluation of standing timber
NZ545247A (en) 2005-02-11 2007-05-31 Waratah Nz Ltd Method and apparatus for assessing or predicting the characteristics of wood
CN104076088A (en) * 2013-09-23 2014-10-01 浙江工商大学 Pine texture detection method
SE540910C2 (en) * 2017-05-02 2018-12-18 Gorzsas Andras Spectroscopic method and device for determining the characteristics of a tree

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8622731D0 (en) * 1986-09-20 1986-10-29 Bio Kil Chemicals Ltd Testing timbers
WO1991008477A2 (en) * 1989-12-01 1991-06-13 Sact Cossonay Holding S.A. Apparatus for automatically and non-destructively determining the class of standardized mechanical properties of a sample of hygroscopic material
US5307679A (en) * 1992-03-25 1994-05-03 The United States Of America As Represented By The Secretary Of Agriculture Method and apparatus for evaluating the drying properties of un-dried wood
US6026689A (en) * 1998-02-25 2000-02-22 Weyerhaeuser Company Log cutting optimization system
WO1999044050A1 (en) * 1998-02-27 1999-09-02 Massachusetts Institute Of Technology Acoustic tree and wooden member imaging apparatus
CA2342167A1 (en) * 1998-08-24 2000-03-02 Carter Holt Harvey Limited Method of selecting and/or processing wood according to fibre characteristics

Also Published As

Publication number Publication date
AU1284202A (en) 2002-04-15
WO2002029398A1 (en) 2002-04-11

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Legal Events

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PSEA Patent sealed
LCEA Licensees added

Name of requester: CARTER HOLT HARVEY LIMITED

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